Eminence PX crossovers feature advanced circuit design to both preserve the crossover and your HF drivers, The cabinet-ready design makes installation a snap while the fitted hardware gives you that ""factory-fit"" finish, Replacing or adding a crossover circuit helps optimize high-performance speaker cabinets use for performing and DJ use, A common crossover problem is L-pad failure brought about by winding burnout when maximum attenuation is prolonged, Full attenuation concentrates the maximum voltage drop in a small winding area - a potentially damaging state even with high-power L-pad devices, In px crossovers, current is limited when the high frequency level control is set to "0" on its scale (9 dB attenuation), A secondary benefit of the design is to form a voltage divider across the high frequency driver, The high-pass protection uses custom-built aerospace lamps, The tungsten filaments effectively track the program material, dynamically maintaining a safe maximum current level to the high frequency driver without introducing distortion, This circuitry provides smooth 3:1 analog compression during input overload conditions over 250 watts RMS, At full drive level approaching clipping, the electrical attenuation to the protected high frequency driver is -4, 5 dB, In every way, Eminence px crossovers are a technically superior product, For use with 8 ohm drivers, Mounting Cut-out 3, 875"" x 6"" SKU: TBALL9029